Prices are for individual blocks, except for Springfield
and Mann-Neidner blocks which are priced as a set.

On-line ordering of scope blocks could be problematic due
to the vast range available. There are no "buy-it-now" buttons
here!

Please note that this product line is all directed
towards the 60° dovetail, external-adjustment type of scopes (including
Redfield 3200).

We do not carry any products for the "modern" Weaver or Picatinny sort of mounts.

We are not familiar with every possible combination of
obscure rifles and sights or scopes being mounted on them.

When we have information that we believe is correct,
we're glad to pass it along. If we don't know, we'll just say so!

There are a lot of shooters and shooting forums where
the information you are seeking may (or may not!) be found.

Many less-common scopes, sights, and rifles are out
there. These may need mounts which constitute "specials", which we
cannot take on at this time (2019).

If time permits (meaning not right away), we'd like to
compile a list giving known rifle/block information, and post it here.

We have many old Unertl and Lyman mount charts for
reference -
including info that is confusing, contradictory, out-of-date, or just
plain wrong!

Additional technical scope block
information...

We certainly do not claim to know everything in this
field, but with experience, many trends have become visible. With
that said, the following information is provided, but is open for
correction or rebuttal!

Scope blocks are also called scope bases. "Base"
seems to be the older term. Avoid using the word "mount"
when talking about scopes!
That can be either the base or the scope ring, and this causes
confusion. (A sight "mount" is correct terminology, but note that
it is not a scope mount.)

Traditional scope blocks often seem to be described as
either "3/8 inch wide" or "1/2 inch wide." In fact they are
neither, although 1/2" is close. Original Unertl dovetails
(the scope rings, not the blocks) generally measure .494" to a theoretical sharp corner. This
matches the older Winchester A5 scope mount dimensions. MVA has
told us that they cut their mounts to .484" to a sharp corner, which is
slightly smaller. It's a theoretical number because due to tip
wear of the cutter, or even the wire EDM radius (if cut that way), a perfectly sharp inside corner on
the mount is
almost never achieved. Thus if the block has a
perfectly sharp corner, it is not a good situation - it would hang up on that small
non-sharp inside corner of the mount. Additionally, because these
"corners" may not actually exist (either in the mount or on
the block), measuring an existing part by going
across the corners may not give a truly useful dimension.

The solution for these issues is two things.
First, the scope block width must be slightly narrower than the mount
that it's intended to fit. And second, the sharp corner of the
block should be knocked off. The standard blocks we make are
targeted to .482" across the sharp corner. But the actual top
width will be .465", which gives an intentional small flat, allowing for
non-sharp-cornered mounts or even dirt in the corners. It also
makes the edge must less susceptible to damage.

Hole spacings for scope blocks are mostly standardized
(although slightly odd) dimensions. Since about 1920 or so, they
seem to have been set at .560" front and .860" rear, with holes tapped
6-48. Sometimes the .560" is .562" - I have old charts which show
both. Realistically that .002" difference is not significant.
There are numerous exceptions to these rules, however. Older
original Stevens rifles (pre-Model 414 rifles) were often drilled at
.700" front and .825" rear, with 5-40 holes. I have encountered a
handful of rifles where the rear holes are spaced .875" (7/8") rather
than .860". (In fact, a tape-measure examination of .860"-spaced
holes may make you think they are spaced at
7/8", which is only rarely true.) Sometimes rifles have been
drilled for Weaver-type mounts, and then the holes may be spaced either
.500" or .504". Remington 40X and 700-series rifles have a spacing
on the rear ring of .600". Remington
513T factory holes are not 6-48; they are 6-44's. Kimber 82G has a front sight (at the muzzle) hole spacing of .500".

A common but understandable misconception exists about
how scope blocks are made. Or more specifically, how we make them
here. We do not have or make "lengths" of dovetail-shaped stock,
from which we cut off the necessary pieces. Consequently we cannot offer
any particular "length" of scope block stock.

Thanks for reading!

Standard mounts vs. Posa mounts - how
to tell the difference...

The mount and blocks on the left of
the picture are standard Unertl mounts.

- The mount is not
split - it's solid all the way around.

- The clamping
thumbnut has a cup-shaped end, and is of one diameter.

- The clamping nut
pushes against one side of the block.

- The block has a
shallow crescent cut (also called a thumbnail or smiley cut).

The parts to the right are the Unertl
"Posa" style.

- The mount is
split or saw-cut through and squeezes onto the block.

- The thumbnut is
square-ended and has two different diameters.

- The nut pulls
the mount together and does not and should not bottom out in the locking cut.

- The block has a
much deeper square-bottomed cut.

Redfield 3200 scopes can use a
standard block for the rimfire mount, but require a

Posa-type block for the "big-bore"
mount. The only difference is the clamp screw itself.

Standard

Standard blocks are available in heights of 3/16", 1/4",
5/16", 3/8", 7/16", 1/2", 5/8", 3/4", and 1". The base has a
slight concavity which allows them to mount on either a round or an
octagonal barrel. Heights are measured from a flat surface.
They will sit .005" to .018" lower on a round barrel. They have the
Lyman/Unertl crescent on one side and the Winchester dimple on
the other.

Price: $20.00
each; 5/8" and taller $23.00 each

Flat-bottom

Flat-bottom blocks are specifically for mounting on an
octagonal barrel. They may "rock" on old draw-filed barrels; in
that case, use the standard blocks (above). Heights available are:
3/16", 1/4", 5/16", and 3/8".

Price: $20.00
each

Posa

Posa blocks are for use with Unertl Posa-mount rings.
They are available either Posa/Lyman combination or Posa only (limited
supply). They can
also be used with the Redfield 3200 "big bore" rings. Heights available are:
3/16", 1/4", 5/16", 3/8", 1/2", 5/8" and 3/4".
Available color-cased also.

Price: $20.00
each black, $24.00 each color-cased.

5/8" and 3/4"
high are $23.00 each - black only.

Color-cased

Color-cased blocks are available in several
configurations, including standard, Posa/Lyman and flat-bottom.
Heights available are: 3/16", 1/4", 5/16", and 3/8".
Flat-bottom are 3/16" height only.

Price: $24.00
each

Stainless Steel

Stainless steel blocks are available either in standard
or Posa/Lyman configurations. Heights available are: 3/16", 1/4", and 5/16".

Price: $26.00
each; stainless screws are $2.00 each

Fecker

Blocks for Fecker mounts are slightly narrower than
standard. (Lyman and Unertl scopes will fit Fecker blocks, but
Fecker scopes may not fit standard blocks).
Heights available are: 3/16", 1/4", and 5/16".

Price: $20.00
each

1903 Springfield

These blocks duplicate the blocks provided on 1903
Springfield rifles. Also available in Posa configuration.
Either color-cased or black finish.

Also on hand - heights that are .100 or .200 taller than
the standard. This allows for low-height scopes such as the Lyman
to clear the bolt handle.

Note - a lot of questions have arisen about using
"Springfield" blocks or Unertl O & E blocks. Functionally they are
identical. My understanding (and I am NOT an '03 expert) is
that the "Springfield" blocks are the style that would have been
provided by the armory, and that the O & E (Unertl-made) is what Unertl would have
provided with their scopes if intended for an '03 rifle. I have
seen O & E marked blocks both square-ended, or somewhat rounded, like
the "Springfield" ones. Adding to the confusion, the opinions
about whether color-cased or black finish is correct, and for exactly what era, seem to be
all over the map.

Price: $50.00
per set

Stevens

These blocks are specifically for Stevens scopes.
They have the original-style V-shaped locking groove, and are available
with either Stevens holes (for 5-40 screws, .700" and .825" spacing) or
with standard holes. They are also available flat-bottomed.
Heights are 3/16" and 1/4".

Tapered blocks for Mann-Neidner mounts,
intended to tighten on recoil. They are specifically for use on
'03 Springfield rifles.

New for 2016 - color-cased finish.

Price: $60.00
per set

Mann-Neidner scope
ring base blanks

Tapered dovetail blank bases, for making your own
Mann-Neidner scope rings. They have been left about 1/4" longer
than finished length, so they can be matched to the tapered blocks being
used and cut to length appropriately. In the white only.
Limited quantities.

Price: $45.00
per set

Cross-dovetail blocks

Meant to go into a standard 3/8" x 60° barrel dovetail.
The lower ones are either 3/16" or 1/4" high. The
higher ones are duplicates of the Unertl BK, K and KK blocks - .365",
.420", and .470" respectively. Provided with the brass set screw. I have some that
are intentionally .005" larger, to be filed to fit.

Price: $28.00
each

Vaver blocks etc.

These blocks are for Vaver front sights. They are
available either for the sights with the little pointy clamp screw, or
for the ones that use the side clamp ring. Heights are .100" or
3/16". The .100" high blocks require special low-head screws.
The clamp rings are also available.

Blocks - $20.00
each

Screws - $1.50
each

Clamp ring -
$5.00

Blanks

We have many blank, undrilled blocks on hand, already
black finished. Heights available are
3/16", 1/4", 5/16", and 3/8".

Price: $20.00
each - note they include screws even though undrilled

Screws

Screws are available for all block heights.
Standard thread is 6-48. Stevens screws are 5-40. But don't
worry if your rifle has yet different tapped holes - I currently have
screws in sizes of 5-48, 6-32, 6-40, 6-44, 8-36, 8-40, 10-32 and 10-36. We
should be able to find it there!

Price: $1.50
each; Stainless $2.00 each

6-48 Taps

Set of taps (plug and bottoming) for standard 6-48 scope
block mount holes. These taps are HSS,
made in USA specifically for Steve Earle Products. Sold as the set
of 2 only.